Advertisements
Advertisements
Question
Differentiate between the following:
Liverworts and Moss
Advertisements
Solution
| Liverworts | Moss | |
| 1. | The gametophytic plant body might be foliose or thallose, such in the case of Riccia. | The prostrate, branching filamentous, thalloid protonema and the leafy, erect gametophore are the two distinct forms that make up the gametophytic plant body. |
| 2. | Simple multicellular scales and unicellular rhizoids are seen on the vebtral surface of the thallus. | The multicellular rhizoids have oblique septa dividing them into branches. |
| 3. | The dorsal surface of the thallus contains the sex organs, which grow from superficial cells. | The superficial cells near the tip of the leafy gametophyte give rise to the sex organs. |
| 4. | Elaters are often found in most cases, but not in Riccha. | There are no elaters. |
| 5. | There are no stomata on the capsule's wall. | Sporophyte has stomata for gaseous exchange. |
| 6. | The capsule dehisces unevenly. | Dehiscence is regular |
APPEARS IN
RELATED QUESTIONS
Name three groups of plants that bear archegonia. Briefly describe the life cycle of any one of them.
Mention the ploidy of the following:
Zygote of a fern
Explain briefly the following term with a suitable example:
protonema
Explain briefly the following term with a suitable example:
Antheridium
Explain briefly the following term with a suitable example:
Archegonium
Explain briefly the following term with a suitable example:
Diplontic
Explain briefly the following term with a suitable example:
Sporophyll
Gemmae are present in ______
A plant shows thallus level of organization. It shows rhizoids and is haploid. It needs water to complete its life cycle because the male gametes are motile. Identify the group to which it belongs to ______.
In Bryophytes male and female sex organs are called ______ and ______.
Draw labelled diagrams of
- Female and male thallus of a liverwort.
- Gametophyte and sporophyte of Funaria.
- Alternation of generation in Angiosperm.
The correct sequence of events in the life cycle of bryophytes is:
- Fusion of antherozoid with egg.
- Attachment of gametophyte to substratum.
- Reduction division to produce haploid spores.
- Formation of sporophyte.
- Release of antherozoids into water.
Choose the correct answer from the option given below:
Match List - I with List - II.
| List - I | List - II |
| A. Chlorophyll a | I. Yellow-green |
| B. Chlorophyll b | II. Yellow |
| C. Xanthophylls | III. Blue-green |
| D. Carotenoids | IV. Yellow to Yellow-orange |
Choose the option with all correct matches.
Match List - I with List - II.
| List - I | List - II |
| A. Pteridophyte | I. Salvia |
| B. Bryophyte | II. Ginkgo |
| C. Angiosperm | III. Polytrichum |
| D. Gymnosperm | IV. Salvinia |
Choose the option with all correct matches.
In bryophytes, the gemmae help in which one of the following?
Identify the pair of heterosporous pteridophytes among the following:
Assertion A: The first stage of gametophyte in the life cycle of moss is protonema stage.
Reason R: Protonema develops directly from spores produced in capsule.
In the light of the above statements, choose the most appropriate answer from the options given below:
